1. BRITISH Standard 5726: Specifications for microbiological safety cabinets,1979
2. Biohazards in biological research;CASALS J.,1973
3. Containment facilities for pathological material;CLARK R. P.;Environ. Int.,1982
4. The performance of containment facilities;CLARK R. P.;J. Soc. environ. Engin.,1982
5. Airborne hazards in the laboratory;CLARK R. P.;Nature,1983